This is Bluebell, my favorite character from the novel "Watership Down," who was left out of both the 1978 film version and the 1999 TV series. Here, Bluebell is telling a joke while he nibbles on some grass.

Here's an excerpt from a post I recently did on my animation facebook group, which involves Bluebell:

"My paperback of the book was 900+ pages long, and the movie is just around 90 minutes. It's probably a good thing that they picked a dark tone and ran with it. There isn't time for anything else. The main comic relief comes from Keehar the gull, voiced by a perfectly cast Zero Mostel. In the novel, there's a lot more humor. For example: in both the book and the movie, the main role of Captain Holly is to experience the worst horrors in the story, and then tell the other characters about them. In the book, he arrives accompanied by another rabbit named Bluebell, who is described as his 'jester.' Bluebell is constantly telling jokes, and Holly credits this 'blue tit's chatter'(yes, that's the description he uses,) with helping him keep his sanity so he could reach Watership Down. In the film, Holly arrives alone. What I'm wondering is, if Bluebell had been included in the movie, would people have assumed that such a comic relief character was added for the 'cartoon?'"